<!DOCTYPE html>
<html>
<body style="margin:0; background:white">
  <svg width="200" height="200" viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg">
    <!-- Approximate saturate(2) of #6d98cc -> #479DFF -->
    <rect x="10" y="10" width="180" height="180" fill="#479DFF"/>
  </svg>
</body>
</html>
